Department of the Environment and Water Resources home page

About us | Contact us | Publications | What's new

Header imagesHeader imagesHeader images

Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Verrucaria margacea (Wahlenb.) Wahlenb.
  Fl. Lappon. 465 (1812). Thelotrema margaceam Wahlenb. , in E.Acharius, Methodus 30 (1803). T: Europe; holo: UPS n.v.  
  Thallus epilithic, continuous to very sparingly rimose, medium to dark grey-green, dark grey, or greenish black, matt, usually smooth, somewhat gelatinous when wetted and 20–40 (–60) µm thick. Algae ellipsoidal to globose, 6–13 × 6–10 µm. Prothallus usually not apparent, occasionally blackish; black basal layer absent. Perithecia prominent, dominated by a 0.25–0.64 mm diam., brown-black involucrellum that may or may not be overgrown by a 20–60 µm thick thalline layer. Involucrellum extending to exciple base, but diverging from the exciple, 40–80 µm thick. Exciple 15–25 (–30) µm thick, hyaline to pale brown at the base, medium to dark brown near the apex. Centrum 0.16–0.35 mm wide. Periphyses 18–35 × 1–2 µm. Asci 75–120 × 22–35 µm. Ascospores ellipsoidal, broadly ellipsoidal or subglobose, 18–34 (–40) × 9–19 µm.
  Occurs on aquatic siliceous rocks in alpine and coastal areas of eastern and south-eastern N.S.W. Also known from western Eurasia and North America, India, New Guinea, China (Hong Kong) and New Zealand.  
  McCarthy (2001h)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from Australian Biological Resources Study. Requests and inquiries concerning reproduction and rights should be addressed in the first instance to Dr P. McCarthy. These pages may not be displayed on, or downloaded to, any other server without the express permission of ABRS.

Top | About us | Advanced search | Contact us | Information services | Publications | Site index | What's new